A first service flow and a second service flow are combined into a backhaul service flow. One or more data structures within a first downlink frame are defined. The first downlink frame comprises an access region and a backhaul region. The one or more data structures are in the backhaul region. The one or more data structures are also defined within a second downlink frame. The second downlink frame comprises the access region and the backhaul region and the one or more data structures are in the backhaul region. The backhaul service flow is distributed into the one or more data structures. The first downlink frame and the second downlink frame are sent. The first downlink frame and the second downlink frame comprise an access map and a backhaul map. The access map has a size that is larger than the backhaul map.
Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A system for in-band backhaul of wireless communication, comprising: a central base station configured to receive a first service flow configured to provide a first Quality of Service (QoS) and a second service flow configured to provide a second Quality of Service (QoS); combine the first service flow and the second service flow into a backhaul service flow configured to provide a backhaul QoS that meets at least the first QoS requirements and the second QoS requirements; distribute the backhaul service flow into a downlink frame; and transmit the downlink frame to a satellite base station, wherein the downlink frame comprises an access region and a backhaul region, the access region comprises an access map configured to define portions of the downlink frame, where the access map is transmitted using a default modulation and coding scheme for transmitting access map data, and the backhaul region comprises a backhaul map configured to define a plurality of data structures in the backhaul region, where the backhaul service flow is distributed into the plurality of data structures and the backhaul region is transmitted using a modulation and coding scheme based on conditions of the communication link between the central base station and the satellite base station.
A wireless communication system performs in-band backhaul using a central base station and a satellite base station. The central base station receives two service flows, each with its own Quality of Service (QoS) requirements. These two flows are combined into a single backhaul service flow that meets or exceeds the QoS of both original flows. This backhaul flow is then incorporated into a downlink frame for transmission. The downlink frame is divided into an access region and a backhaul region. The access region uses a default modulation and coding scheme and contains an access map defining frame portions. The backhaul region contains a backhaul map that defines multiple data structures. The backhaul service flow is distributed across these data structures. The backhaul region uses a modulation and coding scheme optimized for the communication link conditions between the central and satellite base stations.
2. The system of claim 1 , wherein the backhaul map includes a first indicator of a number of the plurality of data structures in the backhaul region and a size for the plurality of data structures.
In the in-band backhaul system described previously, the backhaul map includes information about the data structures within the backhaul region. Specifically, the backhaul map contains an indicator specifying the number of data structures present and the size of each of those data structures within the backhaul region. This allows the receiving satellite base station to properly parse and reassemble the backhaul service flow.
3. The system of claim 1 , wherein the plurality of data structures consist of between two and sixteen data structures.
In the in-band backhaul system described previously, the backhaul region of the downlink frame is divided into a specific number of data structures, ranging from two to sixteen. This constraint on the number of data structures provides a balance between efficient use of the backhaul bandwidth and the complexity of managing the data structures.
4. The system of claim 1 , wherein a first connection indicator sent in the backhaul map is associated with a first data structure of the plurality of data structures.
In the in-band backhaul system described previously, the backhaul map contains connection indicators to associate a specific connection (service flow) with a particular data structure in the backhaul region. A first connection indicator included in the backhaul map identifies the connection associated with a first data structure of the several data structures present. This allows the receiving end to route the data in that first data structure to the correct destination.
5. The system of claim 4 , wherein a second connection indicator associated with a second data structure of the plurality of data structures is implied from the first connection indicator.
In the in-band backhaul system described previously where the backhaul map has connection indicators, if a first connection indicator is associated with a first data structure, then a second connection indicator associated with a second data structure can be derived or implied from that first indicator. This reduces overhead by avoiding the need to explicitly signal every connection indicator.
6. A method of operating a media access control (MAC) layer for in-band backhaul of wireless communication between a central base station and a satellite base station, comprising: establishing a first service flow between the satellite base station and a first wireless device, wherein the first service flow is configured to provide a first Quality of Service (QoS); establishing a second service flow between the satellite station and a second wireless device, wherein the second service flow is configured to provide a second QoS; establishing an in-band backhaul service flow between the central base station and the satellite base station; configuring, by the central base station, the in-band backhaul service flow to include the first service flow and the second service flow, wherein the in-band backhaul service flow is configured to provide an in-band backhaul QoS that meets at least the first QoS requirements and the second QoS requirements; defining, by the central base station, a downlink frame comprising an access region and a backhaul region, wherein the access region comprises an access map that defines portions of the downlink frame and the backhaul region comprises a backhaul map that defines portions of the backhaul region; defining, by the central base station, a plurality of data structures within the backhaul region; and distributing, by the central base station, the in-band backhaul service flow into the plurality of data structures of the backhaul region, wherein the access map defines the backhaul region as a single service flow, and the backhaul map defines the plurality of data structures of the backhaul region; and transmitting, by the central base station, a predetermined amount of downlink frames towards the satellite base station, wherein the access map is transmitted using a default modulation and coding scheme for transmitting access map data, and the backhaul portion is transmitted using a modulation and coding scheme based on conditions of the communication link between the central base station and satellite base station.
A method for in-band backhaul in a wireless communication system using a central and satellite base station involves these steps: First, establish two service flows between the satellite base station and two separate wireless devices, each with its own QoS. Next, establish an in-band backhaul service flow between the central and satellite base stations. Configure the backhaul flow to include the two initial service flows, ensuring the backhaul flow meets or exceeds their combined QoS requirements. Define a downlink frame structure with access and backhaul regions, each with respective maps. Define multiple data structures within the backhaul region. Distribute the backhaul service flow across these data structures. The access map treats the backhaul region as a single service flow, while the backhaul map defines the internal data structure arrangement. Transmit downlink frames, using a default modulation scheme for the access map data and a link-condition-dependent modulation for the backhaul region.
7. The method of claim 6 , wherein the plurality of data structures consist of between two and sixteen data structures.
In the in-band backhaul method previously described, the backhaul region of the downlink frame is divided into a specific number of data structures, ranging from two to sixteen. This constraint on the number of data structures balances backhaul bandwidth usage efficiency with data structure management complexity.
8. The method of claim 6 , wherein the backhaul map comprises a first connection indicator associated with a first data structure of the plurality of data structures.
In the in-band backhaul method previously described, the backhaul map includes connection indicators to associate connections with specific data structures in the backhaul region. A first connection indicator included in the backhaul map identifies the connection associated with a first data structure. This lets the receiver route data in that first data structure to the correct end point.
9. The method of claim 8 , wherein a second connection indicator associated with a second data structure of the plurality of data structures is implied from the first connection indicator.
In the in-band backhaul method previously described where the backhaul map contains connection indicators, if a first connection indicator is associated with a first data structure, then a second connection indicator associated with a second data structure can be derived or implied from the first. This helps reduce the overhead needed for backhaul transmissions.
10. The method of claim 9 , wherein the second connection indicator is implied from the first connection indicator by incrementing the first connection indicator.
In the in-band backhaul method previously described, where a first connection indicator implies a second, the second connection indicator can be derived by incrementing the value of the first connection indicator. This simple derivation further reduces overhead by avoiding complex calculations or lookups to determine associated connection indicators.
11. The method of claim 6 , wherein each data structure of the plurality of data structures within the backhaul region of the downlink frame comprises a fixed-size burst and carries a predetermined amount of data slots through each downlink frame of the predetermined amount of downlink frames.
In the in-band backhaul method described, each data structure in the backhaul region of the downlink frame consists of a fixed-size burst. Each burst then carries a fixed number of data slots through each downlink frame transmitted. This provides predictable bandwidth allocation and simplifies the processing requirements on the receiving end.
12. The method of claim 11 , wherein the predetermined amount of downlink frames transmitted towards the satellite base station are transmitted without changing the size and the position of each data structure of the plurality of data structures with respect to the downlink frame, and the predetermined amount of downlink frames is greater than 10.
In the in-band backhaul method with fixed-size bursts, the size and position of each data structure within the downlink frame remain constant over a series of more than 10 transmitted frames. This fixed structure simplifies processing and resource allocation, enabling a more stable backhaul link.
13. The method of claim 11 , wherein the predetermined amount of downlink frames transmitted towards the satellite base station are transmitted without changing the size and the position of each data structure of the plurality of data structures with respect to the downlink frame, and the predetermined amount of downlink frames is greater than 100.
In the in-band backhaul method with fixed-size bursts, the size and position of each data structure within the downlink frame remain constant over a series of more than 100 transmitted frames. This stable structure over a larger number of frames offers better performance and reduces complexity for satellite base station processing, leading to improved backhaul link performance.
14. The method of claim 6 , wherein each data structure of the plurality of data structures within the backhaul region of the downlink frame comprises a Media Access Control (MAC) Protocol Data Unit, and each service flow of the first service flow and the second service flow is carried on a corresponding MAC Service Data Unit.
In the in-band backhaul method described, each data structure in the backhaul region of the downlink frame contains a Media Access Control (MAC) Protocol Data Unit (PDU). Each service flow of the initial two service flows is carried on a corresponding MAC Service Data Unit (SDU). This structure organizes the data for efficient backhaul transmission.
15. The method of claim 14 , wherein a MAC Protocol Data Unit comprises multiplexed MAC Service Data Units of the first service flow and the second service flow.
In the in-band backhaul method using MAC PDUs and SDUs, the MAC Protocol Data Unit (PDU) contains multiplexed MAC Service Data Units (SDUs) from both of the original service flows. This multiplexing efficiently combines multiple service flows into a single data structure for the backhaul transmission, optimizing bandwidth usage.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
October 9, 2008
August 27, 2013
Browse 5M+ US patents with plain-English claim translations and AI-generated analysis.